Cal-Royal 7540 Antique Brass Columbus Collection Light Duty Single Dummy Door Knob

- Item #: BCI585773

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Antique Brass
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Columbus Series Light Duty Single Dummy Door Knob

The Columbus 7540 single dummy knob is perfect for a pull on one side of the door or a matching non functioning pull on a double door set.


  • Positive Spring Catch Prevents Knob Slipping or Being Pulled Off
  • Concealed Screw Mounting
  • 2-1/8" Cylindrical Housing for Strength and Durability
  • Threaded Outside Rose
  • Heavy Gauge Cold Rolled Steel Internal Mechanism
  • ANSI A156.2
  • Grade 3


  • Knob Diameter: 2"
  • Knob Projection: 2-5/8"
  • Rose Diameter: 2-3/4"

Cal-Royal has focused on providing "Innovative and Value Added" hardware products and accessories to the builders industry since 1983. In accepting this charter, Cal-Royal has continued to be the leader in import hardware. Their product offering is designed to comply with the Americans with Disabilities Act (ADA) and to encompass all levels of ANSI classification, Grades 1, 2 and 3 as well as UL requirements. They offer a complete line of mortise locks, exit devices, door closers, hinges and many other hardware and trim products.

Additional Cal-Royal Links

Our SKU: Cal-Royal 7540

This product is listed under the following manufacturer number(s):

  • Cal-Royal 7540US5
    Antique Brass
  • Cal-Royal 753032D
    Oxidized Satin Brass
  • Cal-Royal 7540US3
    Polished Brass
  • Cal-Royal 7540US32D
    Satin Stainless Steel

*Denotes a finish or option that has been discontinued

Cal-Royal 7540US5 Product Specifications

ANSI Certification A156.2
Approved for Commercial Use Yes
BHMA Certification Grade 3
Collection Columbus
Configuration Door Knob
Function Single Dummy
Handing Left, Reversible, Right
Handle Material Metal
Handle Style Knob
Interconnected No
Knob Diameter 2
Manufacturer Warranty Lifetime Limited
Material Brass, Bronze, Steel
Product Class Commercial
Projection 2.625
Rose Diameter 2.75
Shape Round
Theme Transitional

Installation Resource Center

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